THALI'CTRUM* * 
Linnean Class and Order. Polya'ndria f, Polygy'nia. 
Natural Order. Ranuncula'ce.eJ, Juss. Gen. PI. p. 231. — 
Sm. Gram, of Bot. p. 136. — Lindl. Syn. p. 7. ; lntrod. to Nat. Syst. 
of Bot. p. 6. — Rich, by Macgilliv. p. 465. — Loud. Hort. Brit. p. 495 ; 
Mag. Nat. Hist. v. i. p. 137. — Don’s Gen. Syst. of Gard. and Bot. 
v. i. p. 2. — Mack. FI. Hibern. p. 4. — Rosales ; sect. Ranuncu- 
lin.e ; type, Ranunculaceas ; subtype, Anemone.e ; Burn. Out!, 
of Bot. v.ii. pp. 614, 828, 837, & 838. — Multisiliqu.e, Linn. 
Gen. Char. Calyx ( corolla of Sm.y (fig. 1.) inferior, of 4 or 5 
roundish, obtuse, concave sepals, imbricated in the bud, very deci- 
duous. Corolla none. Filaments (see fig. 2.) numerous, hair-like, 
somewhat thickened at the upper part, various in length. Anthers 
terminal, oblong, drooping, bursting at the edges. Germens (see 
fig. 3) several, superior, egg-shaped, striated. Styles none. Stigmas 
oblique, egg-shaped, tumid, downy. Seeds (figs. 5 & 6.) as many 
as the germens, egg-shaped, furrowed, or winged, without any termi- 
nal appendage. Embryo very minute, with converging cotyledons. 
Distinguished from other genera, in the same class and order, by 
the calyx of 4 or 5 sepals ; the absence of a corolla ; and by the 
seeds being destitute of a terminal awn or appendage. 
Four species British. 
TH AL I'CT RUM F L A'VU M. Yellow-rooted Meadow-Rue. 
Feather-Columbine. 
Spec. Char. Stem upright, branched, furrowed, leafy. Root 
fibrous. Leaves bipinnate ; leaflets wedge-shaped, trifid, acute. 
Panicle compact, somewhat corymbose. Flowers upright. 
Engl. Bot. t. 367. — Curt. Brit. Entomol. v. viii. t. 376. — I.inn. Sp. PI. p. 770. — 
Iluds. FI. Angl. (2nd ed ) p.239. — YVilld. Sp. PI. v. ii. pt ii. p. 1300. — Sm. FI. 
Brit. v. ii. p. 535. Engl. FI. v. iii. p. 42. — With. (7lh ed.) v. lii. p. 674. — Gray’s 
Nat. Arr. v. ii. p. 727. — Lindl. Syn. p. 9. — Hook. Blit. FI. p. 263. — Lightf. FI. 
Scot. v. i. p.285. — Sibth. FI. Oxon. p. 171. — Abbot’s FI. Bedf. p. 120. — Davies’ 
Welsh Bot. p. 54. — Purt. Midi. FI. v. i. p. 267.— Relh. FI. Cant. (3rd ed t.) p. 
220. — Hook. FI. Scot. p. 172. — FI. Devon, pp. 92 & 193. — Johnst. FI. of Berw. 
v. i. p. 121. — Winch’s FI. of Northumb and Durh. p. 37. — Don’s Gen. Syst. of 
Gard. and Bot. p. 14. — Walker’s FI. of Oxf. p. 153. — Perry’s PI. Varv. Select®, 
p. 46. — Pamplin’s PI. of Battersea and Clapham, p. 10. — Bab. FI. Bath. p. 1. — 
Alack. Calal. of PI. of Irel. p. 53. ; FI. llibern. p. 5. — Thalictrum pratense, 
Linn. FI. Lapp. (2nd ed.) p. 189. — Thalictrum nigricans, Jacq. 11. Austr. 
t. 421. — Thalictrum seu Thalictrum majus, Ray’s Syn. p. 208; but not of 
Gerarde, fide Smith. 
Localities. — I n wet meadows, and about the batiks of rivers and ditches. — 
Not uncommon in ENGLAND ; more rare in SCO 1 LAND and IRELAND. 
Perennial. — Flowers in June and July. 
Fig. 1. Calyx. — Fig. 2. A single Flower, with its Calyx, Stamens, and Pistils.— 
Fig. 3. The Pistils. — Fig. 4. A single Pistil, consisting of a German and Stigma 
only, without any Style. — Figs. 5 Sc. 6. Seeds. — Fig. 7. Transverse section of a 
Seed. — Figs. 4, (i, and 7, a little magnified. 
* From thallo, Gr. to grow green ; from the bright colour of the young 
shoots. Don. 
+ See folio 43, note +. 
f See folio 129, a. 
